using System;
 
public class Program {
	public static void Main() {
		string texto = @"From: .... blabla bla
		Message: blablabalab
		//linha em branco
 
		From: .... blabla bla
		Message: blablabalab
 
		//linha em Branco
 
		From: .... blabla bla
		Message: blablabalab";
 
		string[] pedacos = texto.Split(new string[] { "From: ", "Message: " }, StringSplitOptions.RemoveEmptyEntries);
		foreach (var pedaco in pedacos){
			Console.WriteLine(pedaco);
        }
        Console.ReadLine();
	}
}

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